United UA2005 diverts to Madison after attempted cockpit breach by disruptive passenger; Level 4 threat declared
A United Airlines Boeing 737-900 operating UA2005 from Chicago to Minneapolis diverted to Dane County Regional Airport in Madison after pilots declared a Level 4 threat following an alleged attempted cockpit door breach. Off-duty law enforcement subdued the passenger, and local authorities took custody; officials reported no injuries or threats to the public.